Malicious PDF — malware analysis report

Static analysis result for SHA-256 73462fe7678208a5…

MALICIOUS

PDF

99.2 KB Created: 2021-03-29 20:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4440c886f79b43c1fdbf2a68da56b19c SHA-1: 857ab7edb0529733131e0176f9f10546f84d6a99 SHA-256: 73462fe7678208a50f3f2bfb8fe0fa0bf238bddd047e50c65ac193d0c3e974aa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/award?keyword=buffer+stock+adalah+pdf PDF link annotation
    • https://cdn.sqhk.co/jivazufevi/cwhaIMF/58474783712.pdfIn PDF document text
    • http://timinome.getenjoyment.net/dipofojob.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/dijqJxp/zigawevo.pdfIn PDF document text
    • http://tixshopclub.space/97414298109wvue1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_6028a9fa5ca15.pdfIn PDF document text
    • http://ketousa.site/fujepedibawevawopoborajoxtd12n.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/padi_open_water_diver_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/ihgr8je/49686893854.pdfIn PDF document text
    • http://zabovawupe.mypressonline.com/44222677098.pdfIn PDF document text
    • http://girepodemaz.getenjoyment.net/ceh_certified_ethical_hacker_book.pdfIn PDF document text
    • http://masalev.ru/71894941910oww8j.pdfIn PDF document text
    • http://meetsoda.pro/ti_89_titanium_statisticstds2h.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/stem_cell_culture.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9f768ee-4d02-4157-9957-03933cd0b20a/the_hermetica_timothy_freke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b48fd8f-7cf7-4daa-8df8-1834a6a2ebee/5731083430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d048ec-d615-4b13-b023-810728cd8527/71492393959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91979621-0111-4460-b058-9a5348405362/principles_of_communication_engineering_by_anokh_singh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c61fa5-8a89-4f51-a137-e2d81406c668/who_is_lucifer_in_christianity.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEA 1696 bytes
SHA-256: 0727529401fe802ed9d02ac4b3bed84f53da9d0a5838f1dab7fe2f7579417e88
font_01_sfnt_off0000e4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 5892 bytes
SHA-256: f6177ecf6ba0e393bf947635ce2b9a48c076304ea2671c63bf590bf23b870dad
font_02_sfnt_off0000f940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF940 5356 bytes
SHA-256: 2a7299079947cf1686cffd1b964eace080ab84c7f85fb4f68aa57de0eca35be0
font_03_sfnt_off00010b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7E 3552 bytes
SHA-256: 2cd9146587dc8e567d6eda78a623ad9b9cd2b8f6e413f380571771e8f83a4a11
font_04_sfnt_off00011968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11968 4620 bytes
SHA-256: 18c48333875d68322eceb2d05188b3382760728012c0730e3605c079450408e2
font_05_sfnt_off0001281f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281F 14528 bytes
SHA-256: 4168c603786071983f9157b068f72d9233a8fce9fb28efc66ca572ebab1cfc4e
font_06_sfnt_off00015578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15578 17364 bytes
SHA-256: bcb59b86e05e625de6205dffa351458a0fd1dc141a136febc18646d4d4508626
font_07_sfnt_off00016f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F23 3172 bytes
SHA-256: 4e0b6ac863555b0892384628f6e691f13831e18a19e9096e9b0314c52e220fa3

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